A kind of drilling fluid flow pattern regulator and its preparation method

A technology of flow regulator and drilling fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as viscosity, shear force drop, poor performance of drilling fluid, and reduced carrying capacity, so as to reduce the risk of triggering Effects of temperature, increased stability, and strong suppression ability
CN106496408BActive Publication Date: 2019-02-05CHINA PETROCHEMICAL CORP +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROCHEMICAL CORP
Publication Date
2019-02-05

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Abstract

The invention provides a drilling fluid flow pattern regulating agent and a preparation method thereof. The drilling fluid flow pattern regulating agent is formed by copolymerization of acrylamide, acrylate and organic functional monomers under the action of initiators and catalysts. The organic functional monomers are mixtures of 2-acrylamide-2-methylpropane sulfonic acid and acryloyloxyethyl trimethyl ammonium chloride. The catalysts are transition metal catalysts. The mass ratio of the acrylamide to the acrylate to the organic functional monomers is (13-15):(2-4):(3-9). The drilling fluid flow pattern regulating agent and the preparation method thereof have the advantages that the drilling fluid flow pattern regulating agent has high resistance to salt, grease and other contamination, high inhibition capability, good anti-sloughing effect, low content of inferior solid phases and high lubricity, can meet naturally-built inclined shafts and directional wells both with hole drift angles smaller than 20 degrees, has high temperature resistance, and can enable temperature resistance of saline drilling fluid systems to reach above 150 DEG C.
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Description

technical field

[0001] The invention relates to the technical field of chemical product manufacturing, in particular to a drilling fluid flow pattern regulator and a preparation method thereof. Background technique

[0002] The Jianghan Basin is a typical inland fault-depressed salt lake basin with stratigraphic characteristics: special sedimentary environment, stratum salt-gypsum development, and the cumulative thickness of pure salt layers in some blocks reaches more than 1,800 meters; rich brine; high geothermal gradient; high montmorillonite content; The gypsum mudstone is well developed with strong water sensitivity; the formation has strong hydration dispersion and high collapse pressure. With the development of inter-salt non-sandstone, low permeability, lithologic traps and other special reservoirs, the number of highly deviated wells and directional wells has increased.

[0003] According to the special ground and geological conditions of Jianghan Basin, saturated ...

Claims

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